Ventilating device



DE WITT T, LYONP VENTILATING DEVICE- APPLICATION FILED APR. 1s, 192r.

1,4:25 28. Patented Aug. 8, 1.922.

J6 7%55 @201 z /wz.

A TTOR/l/EYS DE WET?! TAYLOI-L BT01", GI-YlICAl-O, ILLINOIS, ASSICTNOB 0F ONE-HALE TO FRANK llZELLISZ-Z, OF CHICAGO, ELLIIIOIS.

VENTILATENG DEVECE.

and exact description.

Mv invention relates to improvements in ventilatine devices and it consists in the combinations w constructions and arrangements herein described. anc claimed.

[in object of my invention is to provide an adjustable ventilator of {the so-called mushroom type that is adapted to be adjusted more quickly and readily in service than any now in use.

A further object of my invention is to provide a deviceoil the character described in which means are provided for locking the relatively movable parts together in any adjusted position.

A ii'urther object of my invention is to provide a device of the character described that is designed to deflect a current of air as desired and. in which no obstruction is interposed to n'event in service the passage of a ventilating fluid as desired.

A. further object of my invention is to provide a device of theeharacter described that is simple in construction and operation, consisting essentially of but two parts, each of which may be termed in a single operation and which is therefore thoroughly prznrtical commercially.

Other objects and advantages will appear in the tollowing; spec-'fication. and the novel features of the invention will be particularly pointed out in the appended. claims.

My invention is illustrated in the accompanying drawings. forming; part of this applicatioin in which Figure 1 is perspective view oi. the de vice.

Figure 2 is a vertical section through the device showing the device applied.

Figure 3 is an enlarged portion of the device showing the cover in section.

I am aware that adjustable ventilators of the character described have been provided prior to my invention. Such devices, while probably theoretically operative have been found to be not altogether satisfactory in practice in that diiiiculty is encountered in Specification of "Letters Patent.

llatented lin 8, 1922.

1921. Serial No. 462,388.

making the required adjustments in service. For example, such devices are commonly installed in theaters and the like and are then positioned beneath chairs or in other places not readily accessible. On account 0t temperature changes and other changing conditions. frequent adjustments of the devices are essential to the proper ventilation or" the room in which installed. In the devices of which I am aware, a spider is embodied in the top or upper part of each and a rod passing therethrough must be gripped and turned in order to vary the adjustment of the device. it is therefore dillicult to determine when a desired adjustment is completed, the spider obstructs the passage of a ventilating fluid through the device, and the parts of the device are ordinarily not locked in adjusted position. It has developed that a period of several months is required to complete the adjustment of the number of ventilating; devices necessary to the maintenance of a healthful condition in a large theater whereas the same number of my improved ventilating devices can be ad-- justed inder like conditions by the same number oi? workmen in a period of less than two days.

In carryin out my invention. l provide a frame having a cylindrical body portion 3. formed .vith a spirally directed continuous rib 2 xtending cxteriorly thereof and constituti r i a a thread of relatively great pit-ch, as clearly shown in the drawings! The body portion 1 is formed integrally with a flange 3 extending outwardly therefrom at a spaced distance from its lower end, the part a of thebody portion located below the flange 3 being uuthreaded. The flange 3 is fashioned with lug extensions 5 spacid apart and provided each with an opening 6 therethrough.

A cover '1 is adapted to close the upper end of the body portion 1 and is formed with a plurality of integral spaced apart depending similar legs or lug extensions 8. Each of the legs 8 is substantially perpendicular to the plane of the cover 7 and is provided i ith spaced apart parallel guiding ribs 9 and 10 extending inwardly from the inner wall thereof for engagement with the thread 2 of the body portion 1, whereby the cover is supported in any desired vertical position relative to the upper end of the v opening body portion 1 that is possible while the guiding ribs 9 and 10, or the lower guiding r1bs10 alone, are positioned to engage the thread 2, which,--as has been stated, is a thereof may be readily understood- The .(lGVlCGIDflY bev positioned beneath a chair 1ft 111 a theater or other place of assembly so that the end portion {l of the "frame fits an 15 in a floor 16 or the lilre. The opening communicates with a duct 17 through which air or other ventilating fluid passes into or from the room. in whichthe device is installed. The flange 3 overlies the floor 16 and the frame is rigidly secured in place by bolts 18 projected through the openings 6 and the floor 16. In practice, fresh an will be forced into the room from the duct 17 through the body portion 1 and the volume of air passing through the K. L- latter'may be regulated at will by ad usting the cover 7 to enlarge or diminish the open space between discover and the upper end of the body portion. The plfiCll or the spl- ,rally directed supporting rib 2 in the form of the device now preferred by me is such that one complete revolution ot-the cover inone direction will occasionthe moving of the latter from completely open position to completely closed position with respect to the frame. Consequently, the cover 7 may be moved instantly to admit any desired volume of fresh air from the duct 17 into the room and when the adjustment has been completed, operation of the set screw 12 in one direction will hold the cover against movement relative to the frame. It will be observed that the central portion of the cover 7 is depressed, the vertex 19 at the center thereof depending vinto a plane below that of the edge portions thereof. The air pass ing upwardly through .the body' portion 1 is thus deflected outwardly in all directions equally. The upper surface .ot the cover has no projections that mightoccasion the tearing of a garmentor the like that was moved into contact therewith.

The frame and the cove-rmay be made otany suitable zmateria-l. I prefer ;to make them ot metal and in practiccthe frame and the cover areeach cast integrally in a. single operation, whereby the device may be produced economically.

cover against movement with respect to said casing. I

2. A device of the character described comprising a cylindrical casing having a spiral rib in its outer wall. and a cover having downwardly projecting legs adapted to abut the outer wall of said casing, saidlegs having inwardly extending ribs adapted to engage with said spiral rib.

3. A device of the character described comprising cylindrical casing having a sp' "al rib in its outer wall, a cover having downwardly projecting legs adaptedto abut the outer wall of said casing, said legs hav- 1? inwardly extending ribs adapted to ,en gage with said spiralsrib, and a set screw carried by one of said legs and beingadapted to engage with the outer wall of said casing.

i. A. device of the character described comprising a "frame having a cylindrical body portion provided with a flange adjacent to one end-thereof adapted to engage with a surface margining the port of a ventilating duct, said body portion being .f tSl1lOI1G(l 'Wl'tl1 a'spirally directed supporting rib exteriorly thereof,=and a cover for said body portion, saidcover being formed with a plurality of depending legs each formed with a guide rib adapted to engage with the spirally directed supporting rib, whereby the cover is supported in'adjusted position with respect to the adj acentend of said body portion.

53. A' device of the character described commising frame castiintegrally of metal and having a cylindrical body portion adapted to be-secured in the port of a ventilating duct, said body portionbeing provided with a spirally directed rib exteriorly thereof, a cover for said body portion, said cover be ing cast integrally of metal and 'lormed with a plurality of spaced apart-guide legs extending at right angles vto the plane of the remote side of the cover, each of said legs being formed with'an inwardly extending rib arranged to engage with said spirally directed rib, and a set screw screwing through a threaded opening in one of said legs for engagement with the 7 body portion, whereby the cover may be maintained in adjusted position relative to theadjacent end of the body portion.

,DE WITT ravLon LYON. 

